[ 15.629373] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.002589] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.356582] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 23.145283] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) [ 37.362323] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) Warning: Permanently added '10.128.15.228' (ECDSA) to the list of known hosts. [ 42.731057] random: sshd: uninitialized urandom read (32 bytes read, 116 bits of entropy available) executing program [ 42.835085] sg_write: data in/out 298234/1 bytes for SCSI command 0xe2-- guessing data in; [ 42.835085] program syzkaller649484 not setting count and/or reply_len properly [ 42.853743] kasan: CONFIG_KASAN_INLINE enabled [ 42.858165] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.870988] Dumping ftrace buffer: [ 42.874495] (ftrace buffer empty) [ 42.878260] Modules linked in: [ 42.881533] CPU: 1 PID: 3330 Comm: syzkaller649484 Not tainted 4.4.110-gdac1439 #13 [ 42.889294] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.898617] task: ffff8801d0e42f80 task.stack: ffff8801d0158000 [ 42.904640] RIP: 0010:[] [] sg_read+0xd1d/0x1490 [ 42.912693] RSP: 0018:ffff8801d015fa80 EFLAGS: 00010246 [ 42.918106] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff825bc124 [ 42.925342] RDX: 0000000000000000 RSI: 0000000020aaaf8f RDI: ffff8801d0aca270 [ 42.932583] RBP: ffff8801d015fb88 R08: 0000000000000000 R09: 0000000000000001 [ 42.939824] R10: 0000000000000000 R11: 1ffff1003a02bf16 R12: 0000000000000071 [ 42.947062] R13: 0000000000000000 R14: ffff8801d0fa4960 R15: ffff8801d0aca240 [ 42.954308] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009202840 [ 42.962586] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 42.968434] CR2: 0000000020aaaf6b CR3: 00000001d6caa000 CR4: 0000000000160670 [ 42.975671] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.982908] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.990143] Stack: [ 42.992270] 0000000000000002 0000000000000002 ffff8801d015fc40 ffff8801d0aca258 [ 43.000790] 0000000100ffffff ffff8801d0aca268 0000000000000095 0000000000000002 [ 43.008738] ffff8801d555d900 0000000000001000 1ffff1003a02bf5c 0000000020aaaf8f [ 43.016684] Call Trace: [ 43.019243] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.025877] [] ? fsnotify+0xee0/0xee0 [ 43.031320] [] ? avc_policy_seqno+0x9/0x20 [ 43.037170] [] do_loop_readv_writev+0x141/0x1e0 [ 43.043453] [] ? security_file_permission+0x89/0x1e0 [ 43.050172] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.056808] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.063441] [] compat_do_readv_writev+0x5df/0x6e0 [ 43.069901] [] ? vfs_writev+0xb0/0xb0 [ 43.075330] [] ? _raw_spin_unlock+0x2c/0x50 [ 43.081271] [] ? handle_mm_fault+0x3f2/0x3190 [ 43.087385] [] ? security_file_permission+0x89/0x1e0 [ 43.094119] [] ? rw_verify_area+0x100/0x2f0 [ 43.100056] [] compat_readv+0xd9/0x140 [ 43.105559] [] compat_SyS_readv+0xd8/0x1b0 [ 43.111419] [] ? SyS_pwritev+0x230/0x230 [ 43.117098] [] ? do_fast_syscall_32+0xd7/0x890 [ 43.123294] [] ? SyS_pwritev+0x230/0x230 [ 43.128973] [] do_fast_syscall_32+0x314/0x890 [ 43.135083] [] sysenter_flags_fixed+0xd/0x17 [ 43.141105] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 97 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 6b 06 00 00 48 8b 1b 48 85 db 0f 84 3b 03 00 [ 43.167551] RIP [] sg_read+0xd1d/0x1490 [ 43.173266] RSP [ 43.176949] ---[ end trace 346b87be633ff503 ]--- [ 43.181676] Kernel panic - not syncing: Fatal exception [ 43.187355] Dumping ftrace buffer: [ 43.190869] (ftrace buffer empty) [ 43.194547] Kernel Offset: disabled [ 43.198141] Rebooting in 86400 seconds..